An infection within the "tear duct" causes a painful swelling in the inner corner of the eyelids.
If the tearing causes severe symptoms, surgery can be performed to create a new tear duct. This operation is called "dacryocystorhinostomy." (see below). Small silicone tubes my be placed in the tear system to keep the new tear duct open while healing occurs. Surgical elimination of the obstruction by creating a new tear duct is necessary to eliminate the tearing and infection that can result from such a blockage
several etiologies, all cause nasolacrimal duct obstruction with obstruction of drainage from lacrimal sac to nose